1 files changed, 2 insertions, 1 deletions
diff --git a/array.c b/array.c
index 635c7c7837..6fd7a75e01 100644
--- a/array.c
+++ b/array.c
@@ -1514,10 +1514,11 @@ rb_ary_sort_bang(VALUE ary)
 	ruby_qsort(RARRAY_PTR(tmp), RARRAY_LEN(tmp), sizeof(VALUE),
 		   rb_block_given_p()?sort_1:sort_2, &RBASIC(tmp)->klass);
 	if (RARRAY(ary)->ptr != RARRAY(tmp)->ptr) {
-	    xfree(RARRAY(ary)->ptr);
+	    if (!ARY_SHARED_P(ary)) xfree(RARRAY(ary)->ptr);
 	    RARRAY(ary)->ptr = RARRAY(tmp)->ptr;
 	    RARRAY(ary)->len = RARRAY(tmp)->len;
 	    RARRAY(ary)->aux.capa = RARRAY(tmp)->aux.capa;
+	    FL_SET(ary, ELTS_SHARED);
 	};
 	FL_UNSET(ary, ELTS_SHARED);
 	RARRAY(tmp)->ptr = 0;